Getting to the Tip of TPI
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Three intake manifold styles were used on the TPI equipped engines. The '87-91 Corvette intake on the left used a heat-riser tube off of the passenger-side header and has a water crossover at the back to relieve hot spots on the back
of the aluminum heads. The middle intake was used on '85-86 IROCs, T/As, and Corvettes with cast-iron heads with outside valve-cover bolt holes (early-style). (The two center bolts on these two intakes are at the same position as the end bolts and will fit the early head-bolt pattern.) The intake on the right was used on '87-92 IROCs and T/As with cast-iron heads with center-bolt valve covers. The '87-95 intakes with the later cast-iron head-bolt pattern can be machined to fit the early bolt pattern. If you want to run Vortec and Fast Burn-style heads, GM and S&P have new TPI intakes to adapt a TPI to both. View Related Article
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